Analogue and Digital Converters

Thread Starter

Hello

Joined Dec 18, 2008
82
A 12-bit D/A converter has a step size of 10mV. Determine the full-scale output voltage.

Any help is greatly appreciated.
 

Thread Starter

Hello

Joined Dec 18, 2008
82
How did u get to the answer?
How is FFF converted to 4095 or [2^12 - 1]?

I do mechanical eng. so im not that good at elec. !

I would appreciate it if u went a bit more in detail.
 

mik3

Joined Feb 4, 2008
4,843
FFF is hexadecimal. In binary FFF equals 111111111111 (twelve 1, four 1 for each F). A 12 bit DAC has (2^12)-1 output voltage steps.
 

Thread Starter

Hello

Joined Dec 18, 2008
82
Ok but how did you convert 111111111111 in decimal i.e. (2^12 -1)?
And why multiply (2^12 -1) with the step size inorder to find the F.S. output voltage?!

Sorry to bother you again.
 

mik3

Joined Feb 4, 2008
4,843
If you read about binary numbers you will find out how you convert it.
If you imagine the output voltage divided into discrete values (steps) and not in a continuous analogue form, and each step equals 10mV then the maximum output voltage is the number of steps times 10mV.
 
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